VB图书管理系统毕业论文 第14页

VB图书管理系统毕业论文 第14页
rs_addreader.Update
   MsgBox "添加读者信息成功！", vbOKOnly, ""
   rs_addreader.Close
   Text1 = ""
   Text2 = ""
   Text3 = ""
   Text4 = ""
   Text5 = ""
   Text6 = ""
  
Else
   MsgBox "读者编号重复！", vbOKOnly + vbExclamation, ""
   Text1.SetFocus
   Text1.Text = ""
   rs_addreader.Close
   Exit Sub
End If
End Sub
Private Sub Command2_Click()
Unload Me
End Sub
Private Sub Form_Load()
Combo2.AddItem "男"
Combo2.AddItem "女"
Dim rs_leibie As New ADODB.Recordset
Dim sql As String
sql = "select * from 读者类别"
rs_leibie.Open sql, conn, adOpenKeyset, adLockPessimistic
rs_leibie.MoveFirst
Do While Not rs_leibie.EOF
  Combo1.AddItem rs_leibie.Fields(0)
  rs_leibie.MoveNext
Loop
rs_leibie.Close
End Sub
10、文件名 frmreaderinfo（frmreaderinfo,frm）
功能说明：读者信息管理，可以修改和删除读者的信息。
源代码：
Option Explicit
Dim rs_reader As New ADODB.Recordset
Private Sub cmdcancel_Click()
   rs_reader.CancelUpdate
   DataGrid1.Refresh
   DataGrid1.AllowAddNew = False
   DataGrid1.AllowUpdate = False
   cmdmodify.Enabled = True
   cmddel.Enabled = True
   cmdcancel.Enabled = False
   cmdupdate.Enabled = False
End Sub
Private Sub cmddel_Click()
Dim answer As String
On Error GoTo delerror
answer = MsgBox("确定要删除吗？", vbYesNo, "")
If answer = vbYes Then
   DataGrid1.AllowDelete = True
   rs_reader.Delete
   rs_reader.Update
   DataGrid1.Refresh
   MsgBox "成功删除！", vbOKOnly + vbExclamation, ""
   DataGrid1.AllowDelete = False
Else
   Exit Sub
End If
delerror:
If Err.Number <> 0 Then
   MsgBox Err.Description
End If
End Sub
Private Sub cmdmodify_Click()
Dim answer As String
On Error GoTo cmdmodify
cmddel.Enabled = False
cmdmodify.Enabled = False
cmdupdate.Enabled = True
cmdcancel.Enabled = True
DataGrid1.AllowUpdate = True
cmdmodify:
If Err.Number <> 0 Then
   MsgBox Err.Description
End If
End Sub
Private Sub Command5_Click()
rs_reader.Update
DataGrid1.Refresh
End Sub
Private Sub cmdupdate_Click()
If Not IsNull(DataGrid1.Bookmark) Then
   rs_reader.Update
End If
   cmdmodify.Enabled = True
   cmddel.Enabled = True
   cmdcancel.Enabled = False
   cmdupdate.Enabled = False
   DataGrid1.AllowUpdate = False
   MsgBox "保存成功！", vbOKOnly + vbExclamation, ""
End Sub
Private Sub Command1_Click()
Unload Me
End Sub
Private Sub Form_Load()
Dim sql As String
On Error GoTo loaderror
sql = "select * from 读者信息"
rs_reader.CursorLocation = adUseClient
rs_reader.Open sql, conn, adOpenKeyset, adLockPessimistic     '打开数据库
cmdupdate.Enabled = False
'设定datagrid控件属性
DataGrid1.AllowAddNew = False                                 '不可增加
DataGrid1.AllowDelete = False                                 '不可删除
DataGrid1.AllowUpdate = False
If userpow = "guest" Then                                     '权限相关

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